Jade is the general name of natural jade in mineral aggregate. There are many kinds of natural jade, which show different forms because of their different chemical composition, density, hardness and refractive index. So natural jadeite is divided into jadeite and nephrite. Jadeite is jadeite, which is produced in Myanmar. With its unique composition and excellent texture, jadeite has become the "king of jade" and is deeply loved by people. Nephrite is a kind of natural jade with lower hardness than jadeite. The natural jade produced in China at present basically belongs to nephrite. The most representative is Hetian jade, a kind of high-quality nephrite produced in Xinjiang. Its beautiful appearance, delicate and moist feel, great investment and collection value, is the best jade in China. In addition, Xiuyu, dushan jade, Qingtian Jade, Chicken Blood Jade, Shoushan Jade, Qinghai Cui, Gong Yu, Turquoise, etc. are also called jade, but they are also called "stones".
jade
Jade, also called jadeite, is the most precious and valuable product among jade. There is only one producing area in the world, Myanmar. Emerald has a large proportion, high hardness and strong toughness. Although diamonds are harder than jadeite, they are far less resistant to falling than jadeite. The colors of jadeite are rich and colorful, and the prices vary by thousands of miles. The top grade should be emerald green. Secondly, there are red, purple, brown, yellow, cyan, white and so on. There seems to be a layer of grease on the surface of good jadeite, which is the luster brought by high-quality jadeite. Emerald hardness 7, specific gravity 3.33. Refractive index of minerals: Ng= 1.667, NP =1.654; The discount rate is 0.0 12. Common jadeite colors are white, gray, pink, light brown, green, emerald green, yellow-green, purple and so on. Most of them are opaque, partly translucent and glassy. According to color and texture, there are more than 20 varieties, such as ruby green, brilliant green, yellow sun green, sunny green, glass green, Ying Ge green, spinach green, shallow water green, light sun green, frog green, melon skin green, plum blossom green, blue-green, gray green, oil green, violet, lotus root powder land and so on.
Buying points:
Texture: you should buy glass products with good transparency, but avoid glass products (commonly known as materials). The key point of identification is that jadeite is partly foggy or mottled when it is transparent, while glass is not foggy or mottled and has bubbles. Green emeralds have shadows and green spots. The colors of glass products are basically the same.
Hardness: Jade is harder than porcelain, glass and other jade, so it can be used to cut glass. You can cut the glass in front of the seller if you buy it. If the seller does not agree, don't buy it easily.
Weight: Jade has a large proportion, which makes it feel heavy in your hand and light in the case of glass. Chinese jade has a large proportion of Henan jade, which is easy to pass off as jade, and its color is close to jade, so it needs comprehensive inspection.
Color: Anyone who is high green (especially gorgeous) or all green must be very cautious, because if it is genuine, its price is extremely high and it is impossible to sell it at normal price. If there are a few green heads with bright colors, that's good and the price is moderate. Single-piece size: the general jewelry area is about 3x 3cm, the pendant area is about 2x 2cm, and the decoration size can be arbitrary. However, pay attention to the thickness. The thickness of a block directly affects the transparency (commonly known as water head). If the transparency is very thin, the transparency will be very low. Generally, 3-5 mm can best identify the transparency, commonly known as 1 head, and it is good to have 1 head.
Workmanship: Pay attention to the craftsmanship of the watch (it is best to observe it with a magnifying glass of 4 times or more). The figure statue mainly depends on whether the face is correct and the facial features are reasonable; Animal statues look at whether the proportion of trunk and limbs is appropriate and whether the shape is natural; Carve to see if the lines are smooth and the layout is reasonable. Pay special attention to whether the concave-convex surface and bottom of the carving are polished smoothly. In addition, we should also carefully look at whether the line thickness is consistent, whether there is a broken knife or overlap. Watch out for cracks in things like bracelets.